Spring and spring-plate.



No. 638,498. Patented Dec. 5, |899.

N. H. DAVIS.

SPRING AND SPRING PLATE.

(Application filed Jan, 17, 1899.)

(N0 Model.)

Vif/264464" we mams Pinzas co. Pworoumo.. wnsmugsfnu. n. c.

rra

nur uric.

NATHAN H. DAVIS, OF PHILADELPHIA, PENNSYLVANIA.

SPRING AND SPRINGMPLATE.

SPECIFICATION forming part of Letters Patent No. 638,498, dated December5, 1899. Application tiled January 17, 1899. Serial No. 702,391. (Nomodel.)

To all whom t may concern,.-

Beit known that LNATHAN H. DAVIS, a citi- Zen of the United States ofAmerica, residing in the city and county of Philadelphia, in the Stateof Pennsylvania, have invented a certain new and useful ImprovementinSprings and Spring-Plates, of which the following is a true and exactdescription, reference being had to the accompanying drawings, whichform a part thereof.

My invention relates to the construction of composite springs such asare commonly used in connection with railway-cars and in which aseriesof springs, generally of a spiral nature, are held between plates knownas springplates and constitute a composite spring.

The object of my invention is to provide a spring of the above characterhaving some novel and useful features of construction, the nature ofwhich will be best understood as described in connection with thedrawings, in which my spring is illustrated, and in which- Figure l is aplan view of the spring; Fig. 2, a cross-sectional view taken on theline 2 2 of Fig. 1, and Fig. 3 a cross-sectional view taken on theirregular line 3 3 of Fig. l and omitting the springs.

A A are the spring-plates, of which two are used in each compositespring. These plates I form with peripheral upwardly turned flanges A'and with a central elevated projection A2, the conformation of theperipheral iiange and central projection being such as to form a seriesof seats or preferably circular plates, such seats being indicated inthe drawings as formed between the co-nvexlycurved portions a of theperipheral flange and the concentrically-curved portions a2 of thecentral projection.

B B, &c., indicate what I will call Iiangedv thimble-plates, eachprovided with a iiat and preferably circular flange B', from whichprojects a hollow thimble-like portion B2. The liat flanged portions Bare in form and dimensions such as-will enable them to fit with somenicety in the seats formed in the plate A, so that each individualflanged thimble-plate is held in position in its appropriate seat andwithout reference to the other lian ged thimble-plates used in theconstruction of the spring.

C C, che., indicate coil-springs thel ends of which extend over thethimble portions B2 and rest against the hanged portions B of each pairof oppositely'- disposed thimbleplates. D D, duc., are also coilsprings, shorter in length than the springs C and with a diameter whichenables them to pass inside of the tliirnbles B2, the length of thesprings D being, as indicated in Fig. 2, such that they are alwaysengaged, so to speak,and guided by the thimbles, even when the spring isunpressed.

The spring-plates A A are held together in any convenient and well-knownmanner. As shown, I form central perforations A3 and a5 in the plates, ahollow thimble E being se4 cured in the lower perforation and a bolt Fserving to connect the thimble with the upper plate A.

At At'E indicate projections from the plates A, by which they areanchored in the beam or bolsters of the parts between which they areset.

Having now described my invention,what I claim as new, and desire tosecure by Letters Patent, is-

l. A spring-plate A having a peripheral flange turned upward or towardits face and a projection or-projectionsin its face to serve inconnection with the iiange to properly space and forrn separate seatsfor a series of two or more flanged thimble-plates in combination withtwo or more such lianged thimble-plates B each havinga liat ange Badapted to rest on the spring-plate in a seat formed between theperipheral flange and the face projection Aand to be held in placethereby said thimble-plates having also a hollow proj eoting thimble B2adapted to center and guide an inner and outer coiled spring.

2. The combination with two spring-plates A A, each having peripheralflanges and face projections forming separate seats on its face, offlanged thimble-plates B each having a iiat ange B adapted to rest onthe face of one of the plates and in one of the seats formed thereon anda hollow thimble-like projection extending from said flange, coiledspiral springs C C fitting over the thiinbles B2 of two oppositethimble-plates B and resting against the flange B thereof, and coiledVspiral springs D D the ends of which iit in the hollow thimbles of theplates B, said springs being of shorter length than the outer springs C.

NATHAN H. DAVIS.

Witnesses:

OHAs. F. MYERS, D. STEWART.

IOO

